linux/include/linux/average.h at master · fabgithub/linux · GitHub

Repository navigation

30 lines (23 loc) · 653 Bytes

#ifndef _LINUX_AVERAGE_H

#define _LINUX_AVERAGE_H

/* Exponentially weighted moving average (EWMA) */

/* For more documentation see lib/average.c */

struct ewma {

unsigned long internal;

unsigned long factor;

unsigned long weight;

};

extern void ewma_init(struct ewma *avg, unsigned long factor,

unsigned long weight);

extern struct ewma *ewma_add(struct ewma *avg, unsigned long val);

/**

* ewma_read() - Get average value

* @avg: Average structure

* Returns the average value held in @avg.

static inline unsigned long ewma_read(const struct ewma *avg)

{

return avg->internal >> avg->factor;

}

#endif /* _LINUX_AVERAGE_H */